3 years ago

Which of the following is a true proportion

Mathematics

1 answer:

Kisachek [45]3 years ago

6 0

The second one, your welcome

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Determine value of y

Alik [6]

Cos 28 = 18/ y
so
y = 18 / cos 28
y = 18 /.8829
y = 20.4

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3 years ago

The ratio of the sides of 2 cubes is 2 to 7. If the volume of the smaller cube is 32 u3, then the volume of the larger cube is _

satela [25.4K]

$\bf \qquad \qquad \textit{ratio relations}
\\\\
\begin{array}{ccccllll}
&Sides&Area&Volume\\
&-----&-----&-----\\
\cfrac{\textit{similar shape}}{\textit{similar shape}}&\cfrac{s}{s}&\cfrac{s^2}{s^2}&\cfrac{s^3}{s^3}
\end{array} \\\\
-----------------------------\\\\
\cfrac{\textit{similar shape}}{\textit{similar shape}}\qquad \cfrac{s}{s}=\cfrac{\sqrt{s^2}}{\sqrt{s^2}}=\cfrac{\sqrt[3]{s^3}}{\sqrt[3]{s^3}}\\\\
-------------------------------\\\\$

$\bf \cfrac{small}{large}\qquad \cfrac{s}{s}=\cfrac{\sqrt[3]{s^3}}{\sqrt[3]{s^3}}\implies \cfrac{2}{7}=\cfrac{\sqrt[3]{32}}{\sqrt[3]{v}}\implies \cfrac{2}{7}=\sqrt[3]{\cfrac{32}{v}}\implies \left( \cfrac{2}{7} \right)^3=\cfrac{32}{v}
\\\\\\
\cfrac{2^3}{7^3}=\cfrac{32}{v}\implies v=\cfrac{7^3\cdot 32}{2^3}$

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3 years ago

X-1/2=15 1/4 whats x and show work

ikadub [295]

X-1/2=15 1/4

15 1/4 = 15*4 + 1 = 61/4

61/4

x - 1/2 = 61/4
+1/2 +1/2

61/4 + 2/4 = 63/4

x = 63/4

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3 years ago

HELP!!! what is the answer to this 5(2)+5(7)

lapo4ka [179]

Answer:

Step-by-step explanation:

Order of Operations: BPEMDAS

Step 1: Write out expression

5(2) + 5(7)

Step 2: Multiply

10 + 35

Step 3: Add

7 0

3 years ago

Read 2 more answers

A driver is 19 meters below the surface of the water. Use an integer to represent how far the driver will need to travel to reac

Tresset [83]

Answer:

19 metres

Step-by-step explanation:

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3 years ago